71 lines
2.1 KiB
PHP
71 lines
2.1 KiB
PHP
;; File: cpu.inc
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;; Structure: idt_gate
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;; .offset_low - TODO
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;; .selector - TODO
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;; .zero - TODO
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;; .attributes - TODO
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;; .offset_high - TODO
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;;
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struc idt_gate
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.offset_low: resw 1
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.selector: resw 1
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.zero: resb 1
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.attributes: resb 1
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.offset_high: resw 1
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endstruc
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;; About: Gates
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;; - Task Gate
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;; > 31 23 15 7 0
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;; > +----------------|----------------+-----------------|-----------------+
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;; > | (NOT USED) | P DPL 0 0 1 0 1 (NOT USED) |
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;; > +----------------|----------------+-----------------|-----------------+
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;; > | SELECTOR | (NOT USED) |
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;; > +----------------|----------------+-----------------|-----------------+
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;;
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;; - Interrupt Gate
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;; > 31 23 15 7 0
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;; > +----------------|----------------+-----------------|-----------------+
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;; > | OFFSET 31..16 | P DPL 0 1 1 1 0 0 0 0 0 0 0 0 0 |
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;; > +----------------|----------------+-----------------|-----------------+
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;; > | SELECTOR | OFFSET 15..0 |
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;; > +--------------- |----------------+-----------------|-----------------+
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;;
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;; - Trap Gate
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;; > 31 23 15 7 0
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;; > +----------------|----------------+-----------------|-----------------+
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;; > | OFFSET 31..16 | P DPL 0 1 1 1 1 0 0 0 0 0 0 0 0 |
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;; > +----------------|----------------+-----------------|-----------------+
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;; > | SELECTOR | OFFSET 15..0 |
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;; > +--------------- |----------------+-----------------|-----------------+
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struc intframe
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;; registers
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.edi: resd 1
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.esi: resd 1
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.ebp: resd 1
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.esp: resd 1
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.ebx: resd 1
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.edx: resd 1
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.ecx: resd 1
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.eax: resd 1
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;;
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.gs: resd 1
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.fs: resd 1
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.es: resd 1
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.ds: resd 1
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.intno: resd 1
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;; by x86 hardware
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.err: resd 1
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.eip: resd 1
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.cs: resd 1
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.eflags: resd 1
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;; crossring
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.useresp: resd 1
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.ss: resd 1
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endstruc
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